Vacuum cleaner



FIG. 1 is a perspective view of a vacuum cleaner showing my new design;

FIG. 2 is a right side view thereof,

FIG. 3 is a front view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a rear view thereof.

The broken line showing of the remainder of the vacuum is for environmental purposes only and forms no part of the clained design. 

CLAIM The ornamental design for a vacuum cleaner, as shown and described. 